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果园中出现药害是由多方面因素引起的,影响药害发生的因素有以下几个方面:(1)药剂本身包括:①药剂的成分及其理化性质,如果选用的药剂含杂质多,物理性状差,使药剂在果树表面不能均匀分布,则很容易出现药害;②药量和施药次数,超量施药、施药间隔期短往往造成药害,如在梨园中夏季防治梨黑星病,如果连续用铜制剂,则很容易出现药害;③药剂的使用方法,如用福美砷防治苹果轮纹病时,如果在生长季节喷雾则易出现药害;④药剂的稀释剂,如果用不
There are many factors that cause injury in the orchard. The factors that affect the occurrence of phytotoxicity include the following aspects: (1) Pharmacy itself includes: (1) The composition and physical and chemical properties of the medicinal agent. If the selected medicament contains more impurities, the physical Poor performance, so that agents can not be evenly distributed on the surface of fruit trees, it is prone to injury; ② dose and application frequency, over-application, short application interval often lead to injury, such as pear in the summer to prevent pear Star disease, if the continuous use of copper preparations, it is prone to injury; ③ the use of pharmaceutical methods, such as the use of thiram against apple rot disease, if the spray season is prone to injury; ④ pharmaceutical diluent, If not use